Methanol over Copper Ion-Exchanged TSM

The results with Cu - and Cu -TSMs (27) are also shown in Table III. Cu -TSM was obtained similarly to Cu -TSM using the Cu(I) ammine complex salt in the ion-exchange reaction. Cu -TSM, copper supported on TSM, was prepared by calcination and subsequent hydrogen reduction of an oligomeric cupric hydroxide intercalate, which had been obtained by precipitating the hydroxide into the interlayer spaces of TSM after the titration method developed by Yamanaka and Brindley (8). The catalytic activity of Cu -TSM is so poor as to be less than one-tenth of that of Cu -TSM, although the molar content of Cu is about twice as high. Because a weak sig- 

Methanol Conversion over Copper Ion-Exchanged Silicate Minerals  

Change of the catalytic activity of Cu -TSM and Cu -Si02 with reaction time. Reaction temperature, 200°C space velocity, 96 ml/min g for Cu -TSM, 301 ml/min g for Cu -Si02 CH3OH concentration, 33%. 

Methyl formate is expected to be one of the intermediates of the methanol-based industries that produce dimethylformamide, acetic acid, pure hydrogen, carbon monoxide, etc. A number of patented catalysts (J8) are therefore composed of copper oxide as a main ingredient and include a variety of metal oxide additives. In our comparative studies, some of these catalysts exhibit fairly good activity but do not exceed Cu -TSM in activity and selectivity (26). The results of the reactions over these patented catalysts, which have relatively high performance levels, are illustrated in Fig. 4 together with the result obtained with Cu -TSM the yield of methyl for- 

TPD specira of ammonia adsorbed on various layer lattice silicates. 

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